A ring barrow is a prehistoric burial monument, typically a low earthen mound enclosed by a circular ditch, and this one in Tooreenduff is a modest but remarkably intact example of the type. What makes it quietly interesting is not its scale but its persistence: the surrounding fosse, though only about twenty centimetres deep today, is still legible, and faint undulations to the north-west and south-east suggest that an outer bank once completed the enclosure.

The earliest recorded measurement of the site comes from Bowman, writing in 1934, who gave the interior diameter as twenty-five feet, or just over seven and a half metres, a figure that aligns reasonably well with the dimensions noted in later survey work. A second possible ring barrow lies approximately sixty metres to the north-north-west, raising the possibility that this part of Tooreenduff once formed a small funerary landscape, a clustering that was not unusual in prehistoric Ireland, where the dead were sometimes gathered into loose groupings across a shared piece of ground.